/*---------------------------------------------------------------------------/
/  FatFs - FAT file system module include file  R0.07        (C)ChaN, 2009
/----------------------------------------------------------------------------/
/ FatFs module is an open source project to implement FAT file system to small
/ embedded systems. It is opened for education, research and development under
/ license policy of following trems.
/
/  Copyright (C) 2009, ChaN, all right reserved.
/
/ * The FatFs module is a free software and there is no warranty.
/ * You can use, modify and/or redistribute it for personal, non-profit or
/   commercial use without any restriction under your responsibility.
/ * Redistributions of source code must retain the above copyright notice.
/
/----------------------------------------------------------------------------*/

#include "integer.h"

/*---------------------------------------------------------------------------/
/ FatFs Configuration Options
/
/ CAUTION! Do not forget to make clean the project after any changes to
/ the configuration options.
/
/----------------------------------------------------------------------------*/
#ifndef _FATFS
#define _FATFS

#define _WORD_ACCESS	0
/* The _WORD_ACCESS option defines which access method is used to the word
/  data in the FAT structure.
/
/   0: Byte-by-byte access. Always compatible with all platforms.
/   1: Word access. Do not choose this unless following condition is met.
/
/  When the byte order on the memory is big-endian or address miss-aligned
/  word access results incorrect behavior, the _WORD_ACCESS must be set to 0.
/  If it is not the case, the value can also be set to 1 to improve the
/  performance and code efficiency. */


#define _FS_READONLY	0
/* Setting _FS_READONLY to 1 defines read only configuration. This removes
/  writing functions, f_write, f_sync, f_unlink, f_mkdir, f_chmod, f_rename,
/  f_truncate and useless f_getfree. */


#define _FS_MINIMIZE	0
/* The _FS_MINIMIZE option defines minimization level to remove some functions.
/
/   0: Full function.
/   1: f_stat, f_getfree, f_unlink, f_mkdir, f_chmod, f_truncate and f_rename
/      are removed.
/   2: f_opendir and f_readdir are removed in addition to level 1.
/   3: f_lseek is removed in addition to level 2. */


#define	_FS_TINY	0
/* When _FS_TINY is set to 1, FatFs uses the sector buffer in the file system
/  object instead of the sector buffer in the individual file object for file
/  data transfer. This reduces memory consumption 512 bytes each file object. */


#define _DRIVES		1
/* Number of volumes (logical drives) to be used. */


#define	_USE_STRFUNC	0
/* To enable string functions, set _USE_STRFUNC to 1 or 2. */


#define	_USE_MKFS	0
/* To enable f_mkfs function, set _USE_MKFS to 1 and set _FS_READONLY to 0 */


#define	_USE_FORWARD	0
/* To enable f_forward function, set _USE_FORWARD to 1 and set _FS_TINY to 1. */


#define	_USE_LFN	0
#define	_MAX_LFN	255		/* Maximum LFN length to handle (max:255) */
/* The _USE_LFN option switches the LFN support.
/
/   0: Disable LFN.
/   1: Enable LFN with static working buffer on the bss. Not re-entrant.
/   2: Enable LFN with dynamic working buffer on the caller's 'stack'.
/
/  The working buffer occupies (_MAX_LFN + 1) * 2 bytes. When enable LFN,
/  a Unicode - OEM code conversion function ff_convert() must be linked. */


#define _CODE_PAGE	932
/* The _CODE_PAGE specifies the OEM code page to be used on the target system.
/  When it is non LFN configuration, there is no difference between SBCS code
/  pages. When LFN is enabled, the code page must always be set correctly.
/   437 - U.S.
/   720 - Arabic
/   737 - Greek
/   775 - Baltic
/   850 - Multilingual Latin 1
/   852 - Latin 2
/   855 - Cyrillic
/   857 - Turkish
/   858 - Multilingual Latin 1 + Euro
/   862 - Hebrew
/   866 - Russian
/   874 - Thai
/   932 - Japanese Shift-JIS       (DBCS)
/   936 - Simplified Chinese GBK   (DBCS)
/   949 - Korean                   (DBCS)
/   950 - Traditional Chinese Big5 (DBCS)
/   1258 - Vietnam
*/


#define	_MULTI_PARTITION	0
/* When _MULTI_PARTITION is set to 0, each volume is bound to same physical
/ drive number and can mount only 1st primaly partition. When it is set to 1,
/ each volume is tied to the partition listed in Drives[]. */


#define _FS_REENTRANT	0
#define _TIMEOUT		1000
/* To make the FatFs module re-entrant, set 1 and re-write platform dependent
/  lock out code that defined arownd _FS_REENTRANT. The _TIMEOUT defines the
/  time out value in unit of milliseconds on the multi access exclusion. */


#define _EXCLUDE_LIB	0
/* When _EXCLUDE_LIB is set to 1, FatFs module does not use standard library. */



/* End of configuration options. Do not change followings without care.     */
/*--------------------------------------------------------------------------*/



/* Definitions corresponds to multiple sector size (Not tested) */

#define	MAX_SS	512U	/* Do not change */
#if MAX_SS > 512U
#define	SS(fs)	((fs)->s_size)
#else
#define	SS(fs)	512U
#endif



/* File system object structure */

typedef struct _FATFS {
	BYTE	fs_type;	/* FAT sub type */
	BYTE	drive;		/* Physical drive number */
	BYTE	csize;		/* Number of sectors per cluster */
	BYTE	n_fats;		/* Number of FAT copies */
	BYTE	wflag;		/* win[] dirty flag (1:must be written back) */
	BYTE	pad1;
	WORD	id;			/* File system mount ID */
	WORD	n_rootdir;	/* Number of root directory entries (0 on FAT32) */
#if _FS_REENTRANT
	HANDLE	h_mutex;	/* Handle to the mutex (Platform dependent) */
#endif
#if MAX_SS > 512U
	WORD	s_size;		/* Sector size */
#endif
#if !_FS_READONLY
	BYTE	fsi_flag;	/* fsinfo dirty flag (1:must be written back) */
	BYTE	pad2;
	DWORD	last_clust;	/* Last allocated cluster */
	DWORD	free_clust;	/* Number of free clusters */
	DWORD	fsi_sector;	/* fsinfo sector */
#endif
	DWORD	sects_fat;	/* Sectors per fat */
	DWORD	max_clust;	/* Maximum cluster# + 1. Number of clusters is max_clust - 2 */
	DWORD	fatbase;	/* FAT start sector */
	DWORD	dirbase;	/* Root directory start sector (Cluster# on FAT32) */
	DWORD	database;	/* Data start sector */
	DWORD	winsect;	/* Current sector appearing in the win[] */
	BYTE	win[MAX_SS];/* Disk access window for Directory/FAT */
} FATFS;



/* Directory object structure */

typedef struct _DIR {
	WORD	id;			/* Owner file system mount ID */
	WORD	index;		/* Current index number */
	FATFS*	fs;			/* Pointer to the owner file system object */
	DWORD	sclust;		/* Table start cluster (0:Static table) */
	DWORD	clust;		/* Current cluster */
	DWORD	sect;		/* Current sector */
	BYTE*	dir;		/* Pointer to the current SFN entry in the win[] */
	BYTE*	fn;			/* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
#if _USE_LFN
	WCHAR*	lfn;		/* Pointer to the LFN working buffer */
	WORD	lfn_idx;	/* Last matched LFN index (0xFFFF:No LFN) */
#endif
} DIR;



/* File object structure */

typedef struct _FIL {
	FATFS*	fs;			/* Pointer to the owner file system object */
	WORD	id;			/* Owner file system mount ID */
	BYTE	flag;		/* File status flags */
	BYTE	csect;		/* Sector address in the cluster */
	DWORD	fptr;		/* File R/W pointer */
	DWORD	fsize;		/* File size */
	DWORD	org_clust;	/* File start cluster */
	DWORD	curr_clust;	/* Current cluster */
	DWORD	dsect;		/* Current data sector */
#if _FS_READONLY == 0
	DWORD	dir_sect;	/* Sector containing the directory entry */
	BYTE*	dir_ptr;	/* Ponter to the directory entry in the window */
#endif
#if !_FS_TINY
	BYTE	buf[MAX_SS];/* File R/W buffer */
#endif
} FIL;



/* File status structure */

typedef struct _FILINFO {
	DWORD fsize;		/* File size */
	WORD fdate;			/* Last modified date */
	WORD ftime;			/* Last modified time */
	BYTE fattrib;		/* Attribute */
	char fname[13];		/* Short file name (8.3 format) */
#if _USE_LFN
	char *lfname;		/* Pointer to the LFN buffer */
	int lfsize;			/* Size of LFN buffer [bytes] */
#endif
} FILINFO;



/* DBCS code ranges */

#if _CODE_PAGE == 932	/* CP932 (Japanese Shift-JIS) */
#define _DF1S	0x81	/* DBC 1st byte range 1 start */
#define _DF1E	0x9F	/* DBC 1st byte range 1 end */
#define _DF2S	0xE0	/* DBC 1st byte range 2 start */
#define _DF2E	0xFC	/* DBC 1st byte range 2 end */
#define _DS1S	0x40	/* DBC 2nd byte range 1 start */
#define _DS1E	0x7E	/* DBC 2nd byte range 1 end */
#define _DS2S	0x80	/* DBC 2nd byte range 2 start */
#define _DS2E	0xFC	/* DBC 2nd byte range 2 end */

#elif _CODE_PAGE == 936	/* CP936 (Simplified Chinese GBK) */
#define _DF1S	0x81
#define _DF1E	0xFE
#define _DS1S	0x40
#define _DS1E	0x7E
#define _DS2S	0x80
#define _DS2E	0xFE

#elif _CODE_PAGE == 949	/* CP949 (Korean) */
#define _DF1S	0x81
#define _DF1E	0xFE
#define _DS1S	0x41
#define _DS1E	0x5A